Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued incentive compensation	$ 216,721	$ 159,356
Accrued compensation and benefits	53,547	41,550
Lease liability	43,441	43,542
Deferred revenue	67,450	53,956
Reserve for policy cancellations	29,213	31,081
Accrued interest	15,871	15,260
Accrued rent and vendor expenses	7,552	6,682
Other	22,364	20,310
Total	$ 456,159	$ 371,737